RxJava+Retrofit结合使用(小案例)

最新推荐文章于 2018-01-22 08:26:57 发布

原创最新推荐文章于 2018-01-22 08:26:57 发布 · 220 阅读

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本文介绍如何利用RxJava与Retrofit框架在Android应用中实现新闻列表的异步加载与显示，包括设置依赖、定义API接口、创建适配器及RecyclerView的配置。

//导入我们所使用的依赖

//rxjava

compile 'io.reactivex::x.y.z'
compile 'io.reactivex:rxandroid:1.0.1
//retrofit2
compile 'com.squareup.retrofit2:retrofit:2.0.2'compile 'com.squareup.retrofit2:converter-gson:2.0.2'compile 'com.squareup.retrofit2:adapter-rxjava:2.0.2'
//recyclerview
compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'compile 'com.github.bumptech.glide:glide:3.7.0'

//创建接口

public interface AipServer {
    @GET("nba/?key=71e58b5b2f930eaf1f937407acde08fe&num=10")
    Observable<Bean<List<NewslistBean>>> getCall();
}

//MainActivity

public class MainActivity extends AppCompatActivity {

    private RecyclerView recyclerView;
    private ArrayList<DataBean> list=new ArrayList<>();
    private AipServer server;
    private Adapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recyclerView = (RecyclerView) findViewById(R.id.rlv);
        LinearLayoutManager manager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        recyclerView.setLayoutManager(manager);

        Retrofit retrofit = new Retrofit.Builder()
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .baseUrl("http://api.tianapi.com/")
                .build();
        server = retrofit.create(AipServer.class);
        initData();
        adapter = new Adapter(this, list);
        recyclerView.setAdapter(adapter);
    }

    private void initData() {
        Observable<Bean<List<NewslistBean>>> call = server.getCall();
        call.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer<Bean<List<NewslistBean>>>() {
                    @Override
                    public void onCompleted() {

                    }

                    @Override
                    public void onError(Throwable e) {

                    }

                    @Override
                    public void onNext(Bean<List<NewslistBean>> listBean) {
                        List<NewslistBean> been = listBean.getNewslist();
                        for (int i = 0; i < been.size(); i++) {
                            list.add(new DataBean(been.get(i).getPicUrl(),been.get(i).getTitle()));
                        }
                        adapter.notifyDataSetChanged();
                    }
                });
    }
}

//适配器

public class Adapter extends RecyclerView.Adapter<Adapter.ViewHolder > {
    private  Context context;
    private  ArrayList<DataBean> list;

    public Adapter(Context context, ArrayList<DataBean> list) {
               this.context=context;
               this.list=list;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view=View.inflate(context,R.layout.item,null);
        ViewHolder holder = new ViewHolder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        Glide.with(context).load(list.get(position).getImg()).into(holder.imageView);
        holder.textView.setText(list.get(position).getName());
    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    class ViewHolder extends RecyclerView.ViewHolder {

        private final ImageView imageView;
        private final TextView textView;

        public ViewHolder(View itemView) {
            super(itemView);
            imageView = itemView.findViewById(R.id.imageView);
            textView = itemView.findViewById(R.id.textView);
        }
    }
}